某水电站坝址河床顺河断裂穿江深斜孔钻探实践

Cross-River Slant-Hole Drilling Practice for a Dam's Along-River Fractured Riverbed

深斜孔是工程勘察中为了特殊地质目的布置的一种钻孔,其施工难度与工艺明显不同于常用的铅直钻孔。以某水电站工程为例,为查明坝址河床发育的区域性顺河断裂空间分布、规模、物质组成、初步工程性状等特征,在两岸岸边布置了成对穿江深斜孔,钻探施工取得了成功。文中重点介绍该工程深斜孔的钻探技术难点、钻探工艺、班组配置及管理,可为其它类似工程参考。

Deep slant-hole is a drilling in engineering investigation,arranged for special geological purposes.The difficulty with the process of its construction was significantly different from the usual vertical drilling.Certain hydropower project will identify the riverbed development at the dam site on the space distribution,size,material composition,preliminary engineering traits and other characteristics of the regional along-river fracture.Cross-river deep slant-holes are assigned in pairs on both bank,which makes the drilling construction a success.Focus is put on the engineering deep slant-hole drilling technical difficulties,the process,team configuration and management,which can be reference for similar projects.